package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.annotation.AutoFill;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.enumeration.OperationType;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class DishServiceImpl implements DishService
{

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    /**
     * 新增菜品和口味
     * @param dishDTO
     */
    @Transactional//因为涉及两张表的操作，为了确保数据的一致性，所以开启注解方式的事务管理
    @Override
    public void saveWithFlavor(DishDTO dishDTO)
    {
        Dish dish = new Dish();

        //对象的属性拷贝
        BeanUtils.copyProperties(dishDTO,dish);
        //向菜品表插入一条数据
        dishMapper.insert(dish);

        //获取insert属性返回的主键值
        Long dishId = dish.getId();


        //向口味表插入N条数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size() > 0)
        {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            //批量插入
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQUery(DishPageQueryDTO dishPageQueryDTO)
    {

        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());

        Page<DishVO> dishVOPage = dishMapper.pageQUery(dishPageQueryDTO);


        return new PageResult(dishVOPage.getTotal(),dishVOPage.getResult());
    }

    /**
     * 菜品批量删除
     * @param ids
     */
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids)
    {
        //判断当前菜品是否能够删除（是否存在起售中的菜品？NO）
        for (Long id : ids)
        {
            Dish dish = dishMapper.getById(id);
            if(dish.getStatus() == StatusConstant.ENABLE)
            {
                //当前菜品处于起售中，不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }

        //判断当前菜品是否能够删除（是否存被套餐管理？NO）
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if(setmealIds != null && setmealIds.size() > 0)
        {
            //当前菜品被套餐关联，不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        //删除菜品数据
        /*for (Long id : ids)
        {
            dishMapper.deleteById(id);

            //删除菜品关联的口味数据
            dishFlavorMapper.deleteByDishId(id);
        }*/

        //批量删除菜品数据
        dishMapper.deleteByIds(ids);

        //批量删除菜品关联的口味数据
        dishFlavorMapper.deleteByDishIds(ids);
    }

    /**
     * 根据ID获取菜品
     * @return
     */
    @Override
    public DishVO getByIdWithFlavor(Long id)
    {
        //根据ID查询菜品数据
        Dish dish = dishMapper.getById(id);

        //根据菜品Id查询口味数据
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);

        //将查询到的数据封装到VO
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);

        return dishVO;
    }


    /**
     * 根据ID动态修改菜品和对应口味信息
     * @param dishDTO
     */

    @Override
    public void updateWithFlavor(DishDTO dishDTO)
    {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //修改菜品表基本信息
        dishMapper.update(dish);



        //修改关联的口味表 --- 先删除原有的口味数据，再插入修改的口味数据
        //删除口味数据
        dishFlavorMapper.deleteByDishId(dish.getId());
        //批量插入口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size() > 0)
        {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            //批量插入
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 菜品启用禁用
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id)
    {
        Dish dish = Dish.builder()
                .status(status)
                .id(id)
                .build();

        dishMapper.update(dish);
    }

    /**
     * 根据分类ID查询菜品
     * @param categoryId
     * @return
     */
    @Override
    public List<Dish> list(Long categoryId)
    {
        Dish dish = Dish.builder()
                .status(StatusConstant.ENABLE)
                .categoryId(categoryId)
                .build();

        List<Dish> list = dishMapper.list(dish);

        return list;
    }



    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
